Image Tools New Tool

Free Online Bulk Image Duotone and Sepia Generator With Brand Colours

Turn photographs into duotones in your browser. Brightness is remapped onto a line between your two colours, the way a press duotone works, rather than a tint laid over the top. Type hex codes from your brand guide, or use ready made pairs including sepia and cyanotype.

Free Forever Nothing Uploaded Any Two Colours Live Preview

Advertisement Slot (Top Banner) Google AdSense Unit • Responsive Banner

Bulk Image Duotone and Sepia Generator Nothing loaded yet

Drop pictures here As many as you like. They are opened by your browser, not by a server. Choose pictures No limit on how many • 40 MB each • nothing is uploaded

The two colours

Shadows

Highlights

Ready made pairs

Sepia is just a duotone with a warm brown highlight, which is why it lives here rather than on a page of its own.

How far

Strength per cent 100

Below a hundred the original colours show through, which keeps a little of the real scene and is often more convincing than the full effect.

Save as

Format GIF and BMP cannot be written by a browser, so those become PNG.

Quality JPEG and WebP only 88

Picture	Before	After	Saved
Everything together	—	—	—

Buy Us A Coffee

Enjoying WizTools123? Help keep our server infrastructure 100% free and open for everyone.

Buy Us A Coffee

Sponsored Content (Below Tool) Google AdSense Placement

Is It Safe to Do This Online?

A fair question, and the answer is checkable.

What happens to your picture	Most sites that do this	This page
Where the work is done	On their server	In your browser
Who else can see the picture	Whoever runs the server	Nobody, it never left
What happens to the GPS location	Reaches them before it is stripped	Never leaves your device
Can you verify the claim	No, you have to trust it	Yes, see below

Check it yourself. Press F12 to open your browser tools and go to the Network tab. Drop a picture in and use the tool. You will see the page fetch its own code and nothing else: your file is never sent. For a stronger test, load this page, turn off your wifi, and use it anyway. It still works, which would be impossible if a server were doing the job.

How to Make a Duotone Picture

Drop, choose, download. Your originals are never touched.

Step 1 Drop your pictures in. As many as you like, and none of them are uploaded.

Step 2 Pick a ready made pair, or set your own shadow and highlight colours.

Step 3 Pull the strength back if you want some of the original colour to survive.

Step 4 Press Apply, then download them singly or all at once as a ZIP.

How a Duotone Actually Works

It is not a colour filter laid on top.

A duotone is a remap, not an overlay. The picture is first reduced to brightness alone, and then every level of brightness is given a colour taken from a line between your two. Dark areas get the shadow colour, bright areas get the highlight colour, everything in between is mixed. Laying a colour on top instead is what makes most online duotones look like a stain.

Sepia is a duotone, which is why it is here. The classic look is a dark brown shadow and a warm cream highlight, and it is offered as a preset rather than as a separate tool. Anything else would be the same code with one name changed.

Contrast in the original is what makes it work. A flat, hazy photograph becomes a flat, hazy duotone. If the result looks muddy, raise the contrast first with our Brightness and Contrast tool and come back.

Two colours print on two plates. If this is going to a press, a real duotone is cheaper than full colour, and the printer will want to know your two inks rather than a flattened picture. Send them the colours as well as the file.

Key Features & Capabilities

What this tool does, and what it deliberately does not.

Never uploaded Everything happens in your browser, so campaign artwork stays where it is until you publish it.

A real duotone Brightness is remapped onto a line between two colours, the way a press duotone works, rather than a colour laid over the top.

Any two colours Type a hex code straight from your brand guide, or pick from ready made pairs including the classic sepia.

Partial strength Let some of the original colour show through, which often looks better than the full effect on a portrait.

You see it as you choose The preview is the real result, so a brand pair can be judged on a real photograph in seconds.

A whole batch at once One pair across a set of photographs, which is how a consistent campaign look is actually made.

About the Bulk Image Duotone and Sepia Generator

A duotone prints a photograph in two inks instead of four. The dark parts take one colour, the light parts take another, and everything in between is a mixture. It has been a staple of posters, record sleeves and annual reports for a century because it looks deliberate and costs less to print than full colour.

Doing it properly means throwing the original colour away first. The picture is reduced to brightness, and then each level of brightness is given a colour from a line drawn between your two choices. Most online tools skip that step and simply lay a colour over the picture, which leaves the original hues fighting the new ones and produces the muddy, stained look that gives duotones a bad name.

Sepia lives here rather than on a page of its own, because sepia is a duotone: a dark brown shadow and a warm cream highlight. A separate tool would be the same code with one name changed, and this site does not do that.

The colours take hex codes straight from a brand guide, the preview is the real result on your own photograph, and a whole batch takes one pair. Everything runs in your browser and nothing is uploaded.

Frequently Asked Questions

Sepia, brand colours, two-tone posters and printing.

Drop the picture here and choose the sepia preset. It sets a dark brown shadow and a warm cream highlight, which is exactly what sepia is. Adjust the two colours afterwards if you want it warmer or cooler.

A filter tints what is already there, so colours fight each other and the result often looks stained. A duotone throws the original colour away first, then paints every level of brightness with a colour taken from a line between your two. That is why a real duotone looks designed and a filter looks like a mistake.

Yes, that is what this is for. Type the hex codes straight from your brand guide into the two boxes. The preview updates immediately, so you can see how a real photograph behaves in your palette before committing to it.

Almost always because the original is flat. A duotone maps brightness, so if the photograph has little difference between light and dark there is nothing for the two colours to separate. Raise the contrast first and try again.

Usually, but not always. Swapping them, so the shadows get the bright colour, produces the inverted look used on a lot of music and festival artwork. The swap button is there for exactly that.

No. The duotone mapping is applied to the pixels in this tab. Disconnect from the internet and the page carries on.